The Full Form of SNCR is Selective non-catalytic reduction.
Selective non-catalytic reduction (SNCR) is a method to lessen nitrogen oxide emissions in conventional power plants that burn biomass, waste and coal. The process involves injecting either ammonia or urea into the firebox of the boiler at a location where the flue gas is between 1,400 and 2,000 °F (760 and 1,090 °C) to react with the nitrogen oxides formed in the combustion process. The resulting product of the chemical redox reaction is molecular nitrogen (N₂), carbon dioxide (CO₂), and water (H₂O).
SNCR
means
Selective non-catalytic reduction
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